UPSC CDS Math Trigonometric Ratios and Trigonometric Identities Questions

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Question : 22 of 107

Marks: +1, -0

What is sin4θ−cos4θ equal to for any real number θ?

[2018 CDS-I]

1
1−2‌sin2θ
2‌cos2θ+1
1−2‌cos2θ

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